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Questions tagged [bitcoin-core]

This tag should be used for questions pertaining to Bitcoin Core. Bitcoin Core is an MIT-licensed Qt 5 GUI application for the original Bitcoin codebase. Additional/previous names include "Bitcoin-Qt", "Satoshi-Client", and "Standard Client". This tag should be used when referring to the Bitcoin Core software.

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195 views

bfgminer on bitcoin-qt

I am getting this error and looking for guidance. Error : Most likely you have input the wrong URL, forgotten to add a port, or have not set up workers config server=1 rpcallowip=192.168.1.0/24 ...
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966 views

Gitian Build Issue - Windows

Got a little issue when compiling Windows QT using Gitian. BTW Im using a Ubuntu 12.04 64bit VPS. So I am using the instructions here : https://cryptocointalk.com/topic/2966-bitcoin-scrypt-v120-...
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959 views

creating our own coin - connection refused error

We are trying to create our own currency. We first started with testnet. The aim is to generate a genesis block and testnet did it very well. However, although we had connection between two ...
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172 views

Bitcoin.conf connect command

When configuring the bitcoin.conf file, what should you put in connect=? There are IP addresses listed here, so I removed the # sign and left them as is. I also entered my WAN address and my local ...
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118 views

Submitted blocks get rejected on Litecoin testnet

I'm trying to submit blocks to the Litecoin Testnet, however everything gets rejected. I got my raw value as ...
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109 views

Number of transactions and transaction history don't match in XenCoinQt

I am solo mining XenCoin using XenCoin QT v0.6.3.3-g069d718-beta. The number of transactions shown on the overview tab is 9, yet there are 7 transactions listed in the transaction history. Also, ...
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207 views

how to run bitcoind server on a ubuntu 13.04 server

I am trying to host a bitcoind on my server so I can connect to it on my website, how do I install it, run it, update the conf file? this is on a server not a desktop
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97 views

Bitcoin Qt message signature construction

I'm trying to construct the message verification signature of bitcoin qt in python. I'm able to compute the couple (r,s) of the signature, but, even I'm not able to find the correct way to encode it ...
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0answers
84 views

Installed Bitcoin-QT on windows2008r2 server, but it won't snyc anything at all

Installed Bitcoin-QT on windows2008r2 server, but it won't sync anything at all. No connections to network, no blocks, no movement full stop. I have OK'd it in windows firewall, tried connecting ...
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555 views

Cannot synchronize with Bitcoin in testnet mode

I downloaded Bitcoin-QT for Windows 7 into: MYUSERNAME/Downloads/bitcoin-0.8.6-win32/bitcoin-0.8.6-win32 I want to run Bitcoin in testnet mode, so I created bitcoin.conf with only the following ...
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164 views

Nonstandard script - TX rejected

I am experimenting in testnet with nonstandard scripts. There was a transaction, created by me, with the following vout script: OP_HASH256 ...
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311 views

bitcoin-qt compiles successfully but runs fail

I have compiled bitoin-qt, PTS coin and other alt-coins successfully, but they can't run concurrently. I use MinGW4.4, QT 4.8.5 downloaded from website and QT creator 2.8.1. This is my .pro setting: ...
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175 views

Old transactions remain unconfirmed after redownloading the blockchain

I received a runaway exception error then deleted everything but wallet.dat from the data directory and opened bitcoin-qt to redownload the blockchain. Transactions larger than 0.00016 btc remain ...
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2k views

Sent bitcoins to my unencrypted wallet and encrypted the wallet before file synced, is there any way i can get them back?

Thanks in advance for any light you can shed on my problem.. I think I sent bitcoins from an online wallet to my offline wallet BitcoinQT(0.81) in august. The transaction has been confirmed, but not ...
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37 views

Huge hdd load when creating keys

I've configured the -keypool=n parameter to create a lot of keys at once. During the generation, the hdd has a lot of IO, why?
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82 views

Bitcoin-Qt locks up

During Initial Sync BitCoin-QT to lock-up and cause Debian Wheezy to crash and reboot...no error message. How do I fix this issue? Subsequent execution of client software has same result.
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184 views

How to export an encrypted non-seedless electrum wallet into bitcoin-qt?

How to export an encrypted non-seedless electrum wallet into bitcoin-qt? Is it even possible? Cheers
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1k views

Bitcoin client fails and reports some database recovery error

I am looking for somebody to help me fix my Bitcoin client, it is corrupt, reads : "A fatal error occured. Bitcoin can no longer continue safely and will quit. EXCEPTION: 22DbRunRecoveryException ...
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455 views

Move all coins from an address via RPC

Let's say I generated some coins with a given address and I want to send a specific amount of coins to a specific addresses, and move the remaining balance to another specific address. I want to do it ...
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1answer
627 views

Where can i find proof of work in bitcoin core source code?

does anyone knows which part of the bitcoin core source code contains the proof of work for mining, creating of block and adding to blockchain? what are the files and functions involves? https://...
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1answer
291 views

Bitcoin wallet balance doesn't add up to what my addresses have

I have had a bitcoin core wallet on windows for a long time. For most of this time I have been inactive. My client has gone out of sync and my wallet sat on my computer as well as a backup on a usb ...
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1answer
528 views

What is a workaround to fundrawtransaction for watchonly addresses

I have imported watchonly addresses in Bitcoin and trying to createrawtransaction with input watchonly listunspend which has spendable=false, scriptSig=empty. after that, I'm getting an error on ...
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1answer
605 views

Sendrawtransaction error on Bitcoin Core Version 0.16.0

I updated my bitcoin core to version 0.16.0, previously I was using v0.15.1. I created an application to send some BTC using listunspent -> createrawtransaction-> signrawtransaction -> ...
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11 views

Configure esplora to point to the bitcoind servers ip address

I have 2 servers running: Ubuntu 18.04 running bitcoind daemon (v0.18.1 full blockchain synchronized) Ubuntu 18.04 running esplora (the local single page website works, but it has no data from the ...
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13 views

problems with unconfirmed transaction of BTC deposits from wallet to wallet with fees paid in advance

i have just started using a BTC wallet called Luno but have 2 unconfirmed transactions still pending while only the 1 transaction went through. 1st transaction was a test with a small amount being ...
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1answer
15 views

Bitcoin 51% majority miner attack - question on the role of user activated soft forks as defense tactic

If one mining entity has alone 52% hash power of the overall network, then this party can block transactions for example and try to "build" up a forked, longer chain while time passes, right?. As I ...
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28 views

if bitcoin miner(s) changed the UTXO set would the bitcoin nodes reject the blocks?

if so, would this cause a Fork? or what would happen?
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17 views

Types of onion address

I'm running a bitcoin core full node with Tor and I've configured a hidden service for that. The point is: bitcoin core log shows me an onion address which is very smaller than the one I found in /var/...
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39 views

Extract ECDSA parameters from Bitcoin Blockchain Block

I am trying to extract the parameters of ECDSA signature used in bitcoin to run some tests. For that i need to obtain : --- r and s , i.e., the ECDSA signature --- H(m) , the hash of ...
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30 views

Sent some testnet Bitcoin to Bitcoin Core wallet but balance is still zero

I got the testnet Bitcoin address with this command: bitcoin-cli -testnet getnewaddress And here is the Bitcoin address: 2NDtNjDbEiNiKDuAnwyKBmRPQ49NNpesdhE As you can see in blockchain there was a ...
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28 views

Backuping account system of bitcoin-core

I'm using bitcoin-core 0.16 currently, i have quite a few number of accounts with the transactions to this accounts. Now, i want to transfer my wallet to another machine, which files should i also ...
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19 views

Getting Started with a Hello World Node.js App making an API call to bitcoin.org

I have been reading around trying to find where/how you can attach a SHA256 or MD5 hash (i.e. a small chunk of data) to a Bitcoin transaction, which led to OP_RETURN, but I have yet to see exactly how ...
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1answer
17 views

Imported keys to electrum

I recently had an unconfirmed transaction on my btc qt wallet. I am upgrading my btc qt now and it is syncing. In the meantime I imported my keys from all my receiving addresses to a software wallet. ...
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1answer
12 views

Flatpak bitcoin-core not generating .cookie file

I'm using the version of Bitcoin-Qt 0.18.1 that comes with Flatpak. I've looked in the Bitcoin datadir, which is in ~/.var/app/org.bitcoincore.bitcoin-qt/data/ and there isn't any .cookie file there. ...
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2answers
66 views

Unconfirmed transaction. How to make my wallet made whole

I am running a node with an unconfirmed transaction. I tried shutting down my btc qt so the transaction would be forgotten. To no avail it keeps rebroadcasting the transaction. I am in the process of ...
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1answer
63 views

Why is Bitcoin Core full node so slow to sync?

After 12 hours, progress changed from progress=0.533751 to progress=0.541254, less than 1% progress. $ ./bitcoind ... 0 hours: 2019-10-12T17:57:11Z UpdateTip: new best=...
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1answer
46 views

Try to migrate Bitcoin Core wallet to an HD wallet but get “St13runtime” exception

I am trying to follow these steps to migrate my wallet to an HD wallet. But it failed, the debug log has errors like this: EXCEPTION: St13runtime_error DeriveNewSeed: AddKeyPubKey failed bitcoin in ...
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0answers
34 views

Bitcoin core causing reboot

I have been having an issue with bitcoin core lately. It has been causing my computer to randomly reboot about every hour or so. I was on version 17.1 but upgraded to 18.0 hoping that would fix the ...
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41 views

Unused Output Tree in the Blockchain

I have been reading about the security of thin clients and I came across the section that discusses the proposal of Unused Output Tree in the Block chain. Unused Output Tree in the Block chain (UOT)...
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27 views

Help linking External Storage for bitcoin data using Raspberry Pi?

I mounted my external disk to wrong directory (wanted it to be ~/bitcoinData) , instead ended up creating a directory on SD card ( /home/pi/bitcoinData ) and now SD card (root) is full. i cannot seem ...
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51 views

How get the public key to hex script? like command decodescript of bitcoin core

If I want to recreate the command decodescript of bitcoin core? how is the process for decode the script P2PK? So I'm writing for personal exercise the Bitcoin script decompiler, form moment I have a ...
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38 views

Create P2SH address is not same as address saved on rpc node

I have a private key and trying to create P2SH address on testnet like my node created but they're not same. Please help me a bit, thanks so much. PrivateKey: ...
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31 views

How do I determine the descriptor of a given Extended Public Key?

I am trying to run the bitcoin-cli getdescriptorinfo on a ypub... extended public key. Every time I do this I receive the message: error code: -5 error message: Invalid descriptor How can I ...
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86 views

Any method to check balance of particular address in bitcoin core (0.18) using json rpc?

Setup bitcoin core (0.18) in my local node.In new version maximum methods are deprecated.I create new address using json rpc method and send some coin s on it.Now I am unable to check the balance of ...
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31 views

Bitcoin Module - Hash512-EVP_ByteToToken

Is there any standalone software modules created which allow the user to complete the following: 1. Enter in passphrase 2. Enter a given salt 3. Enter the number of rounds I am looking ...
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18 views

Why is systemd service file not using my config and why is it failing in general?

When I start simply with bitcoind and stop with bitcoin-cli stop everything works fine. But if I start bitcoind with sudo systemctl start bitcoind and I made this /etc/systemd/system/bitcoind.service:...
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2answers
59 views

How to reduce Bitcoin loaded wallet memory?

The server has 2GB of RAM memory. It takes up a lot of memory when I create or load a wallet. When I create about 50 wallets, the server is very slow because the memory is full. Is there a way to ...
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38 views

Bitcoin Core gives error “Error reading from database, shutting down” during first time setup

I have recently installed Bitcoin Core on my Gentoo system via portage. During the first time setup, the initial download stopped at roughly 30% completion and gave the error "Error reading from ...
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1answer
27 views

What is a mechanism of providing Merkle Path?

In the Bitcoin, SPV node can query that its transaction is included specific block to full node that provides merkle path which has super fast calculation. In terms of full nodes, they have full-...
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19 views

How to build most basic bitcoin-qt from source?

When testing and fiddling with different settings for bitcoin-qt, I have to build bitcoin-qt from scratch from time to time. I am using Ubuntu. Since this is time consuming, I'm wondering what kind of ...